********** variable unification
  IN: <<$1 --> bird> ==> <$1 --> flyer>>. %1.00;0.90% {0 : 1} 
  IN: <<$1 --> bird> ==> <$1 --> flyer>>. %0.00;0.70% {0 : 2} 
1
 OUT: <<$1 --> bird> ==> <$1 --> flyer>>. %0.79;0.92% {1 : 1;2} 
********** variable unification
  IN: <<$1 --> bird> ==> <$1 --> animal>>. %1.00;0.90% {0 : 1} 
  IN: <<$1 --> robin> ==> <$1 --> bird>>. %1.00;0.90% {0 : 2} 
3
 OUT: <<$1 --> robin> ==> <$1 --> animal>>. %1.00;0.81% {3 : 2;1} 
 OUT: <<$1 --> animal> ==> <$1 --> robin>>. %1.00;0.45% {3 : 2;1} 
********** variable unification
  IN: <<$1 --> swan> ==> <$1 --> bird>>. %0.90;0.80% {0 : 1} 
  IN: <<$1 --> swan> ==> <$1 --> swimmer>>. %0.80;0.90% {0 : 2} 
3
 OUT: <<$1 --> swimmer> ==> <$1 --> bird>>. %0.90;0.37% {3 : 2;1} 
 OUT: <<$1 --> bird> ==> <$1 --> swimmer>>. %0.80;0.39% {3 : 2;1} 
 OUT: <<$1 --> bird> <=> <$1 --> swimmer>>. %0.73;0.41% {3 : 2;1} 
 OUT: <<$1 --> swan> ==> (||,<$1 --> bird>,<$1 --> swimmer>)>. %0.98;0.72% {3 : 2;1} 
 OUT: <<$1 --> swan> ==> (&&,<$1 --> bird>,<$1 --> swimmer>)>. %0.72;0.72% {3 : 2;1} 
********** variable unification
  IN: <<bird --> $1> ==> <robin --> $1>>. %0.80;0.80% {0 : 1} 
  IN: <<swimmer --> $1> ==> <robin --> $1>>. %0.70;0.90% {0 : 2} 
3
 OUT: <<bird --> $1> ==> <swimmer --> $1>>. %0.80;0.34% {3 : 2;1} 
 OUT: <<swimmer --> $1> ==> <bird --> $1>>. %0.70;0.37% {3 : 2;1} 
 OUT: <<bird --> $1> <=> <swimmer --> $1>>. %0.60;0.40% {3 : 2;1} 
 OUT: <(&&,<bird --> $1>,<swimmer --> $1>) ==> <robin --> $1>>. %0.94;0.72% {3 : 2;1} 
 OUT: <(||,<bird --> $1>,<swimmer --> $1>) ==> <robin --> $1>>. %0.56;0.72% {3 : 2;1} 
********** variable unification
  IN: <(&&,<$1 --> b>,A) ==> <$1 --> c>>. %1.00;0.90% {0 : 1} 
  IN: <<$1 --> d> ==> <$1 --> b>>. %1.00;0.90% {0 : 2} 
1
 OUT: <(&&,<$1 --> d>,A) ==> <$1 --> c>>. %1.00;0.81% {1 : 2;1} 
********** variable unification
  IN: <(&&,<$1 --> b>,A,E) ==> <$1 --> c>>. %1.00;0.90% {0 : 1} 
  IN: <(&&,<$1 --> d>,A) ==> <$1 --> c>>. %0.80;0.90% {0 : 2} 
2
 OUT: <(&&,<$1 --> b>,E) ==> <$1 --> d>>. %1.00;0.39% {2 : 1;2} 
 OUT: <<$1 --> d> ==> (&&,<$1 --> b>,E)>. %0.80;0.45% {2 : 1;2} 
********** variable unification
  IN: <(&&,<$1 --> a>,B) ==> <$1 --> c>>. %0.70;0.90% {0 : 1} 
  IN: <<$1 --> a> ==> <$1 --> d>>. %1.00;0.90% {0 : 2} 
1
 OUT: <(&&,<$1 --> d>,B) ==> <$1 --> c>>. %0.70;0.45% {1 : 2;1} 
****** variable elimination
  IN: <<$1 --> bird> ==> <$1 --> animal>>. %1.00;0.90% {0 : 1} 
  IN: <robin --> bird>. %1.00;0.90% {0 : 2} 
1
 OUT: <robin --> animal>. %1.00;0.81% {1 : 2;1} 
********** variable elimination
  IN: <<$1 --> bird> ==> <$1 --> animal>>. %1.00;0.90% {0 : 1} 
  IN: <robin --> animal>. %1.00;0.90% {0 : 2} 
1
 OUT: <robin --> bird>. %1.00;0.45% {1 : 2;1} 
********** variable elimination
  IN: <<$1 --> animal> <=> <$1 --> bird>>. %1.00;0.90% {0 : 1} 
  IN: <robin --> bird>. %1.00;0.90% {0 : 2} 
1
 OUT: <robin --> animal>. %1.00;0.81% {1 : 2;1} 
********** variable elimination
  IN: (&&,<#1 --> bird>,<#1 --> swimmer>). %1.00;0.90% {0 : 1} 
  IN: <swan --> bird>. %0.90;0.90% {0 : 2} 
1
 OUT: <swan --> swimmer>. %0.90;0.43% {1 : 2;1} 
********** variable elimination
  IN: <(&&,<$1 --> a>,B) ==> <$1 --> c>>. %1.00;0.90% {0 : 1} 
  IN: <e --> a>. %1.00;0.90% {0 : 2} 
1
 OUT: <B ==> <e --> c>>. %1.00;0.81% {1 : 2;1} 
********** variable elimination
  IN: <(&&,<$1 --> b>,A,C) ==> <$1 --> d>>. %1.00;0.90% {0 : 1} 
  IN: <e --> b>. %1.00;0.90% {0 : 2} 
1
 OUT: <(&&,A,C) ==> <e --> d>>. %1.00;0.81% {1 : 1;2} 
********** multiple variable elimination
  IN: <(&&,<$1 --> key>,<$2 --> lock>) ==> <$2 --> (/,open,$1,_)>>. %1.00;0.90% {0 : 1} 
  IN: <{lock1} --> lock>. %1.00;0.90% {0 : 2} 
2
 OUT: <<$1 --> key> ==> <{lock1} --> (/,open,$1,_)>>. %1.00;0.81% {2 : 1;2} 
********** multiple variable elimination
  IN: <<$1 --> lock> ==> (&&,<#2 --> key>,<$1 --> (/,open,#2,_)>)>. %1.00;0.90% {0 : 1} 
  IN: <{lock1} --> lock>. %1.00;0.90% {0 : 2} 
1
 OUT: (&&,<#1 --> key>,<{lock1} --> (/,open,#1,_)>). %1.00;0.81% {1 : 2;1} 
********** multiple variable elimination
  IN: (&&,<#1 --> lock>,<<$2 --> key> ==> <#1 --> (/,open,$2,_)>>). %1.00;0.90% {0 : 1} 
  IN: <{lock1} --> lock>. %0.90;0.90% {0 : 2} 
1
 OUT: <<$1 --> key> ==> <{lock1} --> (/,open,$1,_)>>. %0.90;0.43% {1 : 2;1} 
********** multiple variable elimination
  IN: (&&,<#1 --> (/,open,#2,_)>,<#1 --> lock>,<#2 --> key>). %1.00;0.90% {0 : 1} 
  IN: <{lock1} --> lock>. %0.90;0.90% {0 : 2} 
1
 OUT: (&&,<#1 --> key>,<{lock1} --> (/,open,#1,_)>). %0.90;0.43% {1 : 2;1} 
********** variable introduction : induction
  IN: <swan --> bird>. %1.00;0.90% {0 : 1} 
  IN: <swan --> swimmer>. %0.80;0.90% {0 : 2} 
1
 OUT: <<$1 --> bird> ==> <$1 --> swimmer>>. %0.80;0.45% {1 : 2;1} 
 OUT: <<$1 --> swimmer> ==> <$1 --> bird>>. %1.00;0.39% {1 : 2;1} 
 OUT: <<$1 --> bird> <=> <$1 --> swimmer>>. %0.80;0.45% {1 : 2;1} 
 OUT: (&&,<#1 --> bird>,<#1 --> swimmer>). %0.80;0.81% {1 : 2;1} 
********** variable introduction : abduction
  IN: <gull --> swimmer>. %1.00;0.90% {0 : 1} 
  IN: <swan --> swimmer>. %0.80;0.90% {0 : 2} 
1
 OUT: <<gull --> $1> ==> <swan --> $1>>. %0.80;0.45% {1 : 2;1} 
 OUT: <<swan --> $1> ==> <gull --> $1>>. %1.00;0.39% {1 : 2;1} 
 OUT: <<gull --> $1> <=> <swan --> $1>>. %0.80;0.45% {1 : 2;1} 
 OUT: (&&,<gull --> #1>,<swan --> #1>). %0.80;0.81% {1 : 2;1} 
********** multiple variables introduction
  IN: <{key1} --> (/,open,_,{lock1})>. %1.00;0.90% {0 : 1} 
  IN: <{key1} --> key>. %1.00;0.90% {0 : 2} 
2
 OUT: <<$1 --> key> ==> <$1 --> (/,open,_,{lock1})>>. %1.00;0.45% {2 : 1;2} 
 OUT: (&&,<#1 --> (/,open,_,{lock1})>,<#1 --> key>). %1.00;0.81% {2 : 1;2} 
********** multiple variables introduction
  IN: <<$1 --> key> ==> <$1 --> (/,open,_,{lock1})>>. %1.00;0.90% {0 : 1} 
4
 OUT: <<$1 --> key> ==> <{lock1} --> (/,open,$1,_)>>. %1.00;0.90% {0 : 1} 
********** multiple variables introduction
  IN: (&&,<#1 --> (/,open,_,{lock1})>,<#1 --> key>). %1.00;0.90% {0 : 1} 
3
 OUT: (&&,<#1 --> key>,<{lock1} --> (/,open,#1,_)>). %1.00;0.90% {0 : 1} 
********** multiple variables introduction
  IN: <<$1 --> key> ==> <{lock1} --> (/,open,$1,_)>>. %0.80;0.90% {0 : 1} 
  IN: <{lock1} --> lock>. %1.00;0.90% {0 : 2} 
1
 OUT: (&&,<#1 --> lock>,<<$2 --> key> ==> <#1 --> (/,open,$2,_)>>). %0.80;0.81% {1 : 2;1} 
 OUT: <(&&,<$1 --> key>,<$2 --> lock>) ==> <$2 --> (/,open,$1,_)>>. %1.00;0.39% {1 : 2;1} 
********** multiple variables introduction
  IN: (&&,<#1 --> key>,<{lock1} --> (/,open,#1,_)>). %0.80;0.90% {0 : 1} 
  IN: <{lock1} --> lock>. %1.00;0.90% {0 : 2} 
1
 OUT: (&&,<#1 --> key>,<#2 --> (/,open,#1,_)>,<#2 --> lock>). %0.80;0.81% {1 : 2;1} 
 OUT: <<$1 --> lock> ==> (&&,<#2 --> key>,<$1 --> (/,open,#2,_)>)>. %1.00;0.39% {1 : 2;1}